This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 21 |
| 5 | 6 |
| 6 | 216 |
| 7 | 8 |
| 8 | 315 |
| 9 | 52 |
| 10 | 432 |
| 11 | 12 |
| 12 | 80640 |
| 13 | 14 |
| 14 | 720 |
| 15 | 864 |
| 16 | 9765 |
| 17 | 18 |
| 18 | 176904 |
| 19 | 20 |
| 20 | 232848 |
| 21 | 1408 |
| 22 | 1512 |
| 23 | 24 |
| 24 | 149299200 |
| 25 | 186 |
| 26 | 2016 |
| 27 | 2080 |
| 28 | 460992 |
| 29 | 30 |
| 30 | 274827168 |
| 31 | 32 |
| 32 | 615195 |
| 33 | 2880 |
| 34 | 3240 |
| 35 | 3744 |
| 36 | 13333320000 |
| 37 | 38 |
| 38 | 3960 |
| 39 | 3808 |
| 40 | 680400000 |
| 41 | 42 |
| 42 | 702079488 |
| 43 | 44 |
| 44 | 1270080 |